Qt鏈接器錯誤

Question

我一直在努力讓Qt工作（QCreator，QIde，現在VS2008）。

我已經整理出了大量的問題，但我現在面臨着以下的構建錯誤，並坦率地說，我超出了想法。

Error 1 error LNK2019: unresolved external symbol "public: void __thiscall FileVisitor::processFileList(class QStringList)" (?processFileList@FileVisitor@@QAEXVQStringList@@@Z) referenced in function _main codevisitor-test.obj Question1 
Error 2 error LNK2019: unresolved external symbol "public: void __thiscall FileVisitor::processEntry(class QString)" (?processEntry@FileVisitor@@QAEXVQString@@@Z) referenced in function _main codevisitor-test.obj Question1 
Error 3 error LNK2019: unresolved external symbol "public: class QString __thiscall ArgumentList::getSwitchArg(class QString,class QString)" (?getSwitchArg@ArgumentList@@QAE?AVQString@@V2@0@Z) referenced in function _main codevisitor-test.obj Question1 
Error 4 error LNK2019: unresolved external symbol "public: bool __thiscall ArgumentList::getSwitch(class QString)" (?getSwitch@ArgumentList@@QAE_NVQString@@@Z) referenced in function _main codevisitor-test.obj Question1 
Error 5 error LNK2019: unresolved external symbol "public: void __thiscall ArgumentList::argsToStringlist(int,char * * const)" (?argsToStringlist@ArgumentList@@QAEXHQAPAD@Z) referenced in function "public: __thiscall ArgumentList::ArgumentList(int,char * * const)" (??0ArgumentList@@QAE@HQAPAD@Z) codevisitor-test.obj Question1 
Error 6 error LNK2019: unresolved external symbol "public: __thiscall FileVisitor::FileVisitor(class QString,bool,bool)" (??0FileVisitor@@QAE@VQString@@_N1@Z) referenced in function "public: __thiscall CodeVisitor::CodeVisitor(class QString,bool)" (??0CodeVisitor@@QAE@VQString@@_N@Z) codevisitor-test.obj Question1 
Error 7 error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall FileVisitor::metaObject(void)const " (?metaObject@FileVisitor@@UBEPBUQMetaObject@@XZ) codevisitor-test.obj Question1 
Error 8 error LNK2001: unresolved external symbol "public: virtual void * __thiscall FileVisitor::qt_metacast(char const *)" (?qt_metacast@FileVisitor@@UAEPAXPBD@Z) codevisitor-test.obj Question1 
Error 9 error LNK2001: unresolved external symbol "public: virtual int __thiscall FileVisitor::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@FileVisitor@@UAEHW4Call@QMetaObject@@HPAPAX@Z) codevisitor-test.obj Question1 
Error 10 error LNK2001: unresolved external symbol "protected: virtual bool __thiscall FileVisitor::skipDir(class QDir const &)" (?skipDir@FileVisitor@@MAE_NABVQDir@@@Z) codevisitor-test.obj Question1 
Error 11 fatal error LNK1120: 10 unresolved externals ... \Visual Studio 2008\Projects\Assignment1\Question1\Question1\Debug\Question1.exe Question1 

的代碼如下：提前

#include "argumentlist.h" 
#include <codevisitor.h> 
#include <QDebug> 

void usage(QString appname) { 
    qDebug() << appname << " Usage: \n" 
     << "codevisitor [-r] [-d startdir] [-f filter] [file-list]\n" 
     << "\t-r  \tvisitor will recurse into subdirs\n" 
     << "\t-d startdir\tspecifies starting directory\n" 
     << "\t-f filter\tfilename filter to restrict visits\n" 
     << "\toptional list of files to be visited"; 
} 

int main(int argc, char** argv) { 
    ArgumentList al(argc, argv); 
    QString appname = al.takeFirst(); /* app name is always first in the list. */ 
    if (al.count() == 0) { 
     usage(appname); 
     exit(1); 
    } 
    bool recursive(al.getSwitch("-r")); 
    QString startdir(al.getSwitchArg("-d")); 
    QString filter(al.getSwitchArg("-f")); 
    CodeVisitor cvis(filter, recursive); 
    if (startdir != QString()) { 
     cvis.processEntry(startdir); 
    } 
    else if (al.size()) { 
     cvis.processFileList(al); 
    } 
    else 
     return 1; 
    qDebug() << "Files Processed: %d" << cvis.getNumFiles(); 
    qDebug() << cvis.getResultString(); 
    return 0; 
} 

謝謝，我只是難倒。

Answer 1

確保您的項目文件包含包含FileVisitor和ArgumentList類錯誤指示的函數定義的* .cpp文件。另外，正如科蒂所說，如果函數的定義在庫文件中，請確保將該lib文件鏈接到您的項目。